Cahokia: A City of Earth Beside the River
About a thousand years ago, one of the largest cities in North America stood beside the Mississippi River. It was near where St. Louis is today. Its people are known as the Mississippians, and the city is now called Cahokia. At its busiest, thousands of people lived there.
The most striking feature of Cahokia is its mounds. The workers had no wheelbarrows, wagons, or work animals. They carried soil in baskets, load after load, and packed it into huge hills with flat tops. The biggest, called Monks Mound, is still the largest earthen mound in North America. Important buildings once stood on top of the mounds, and leaders probably held ceremonies there.
Near the center of the city lay a wide open plaza where people gathered for games, markets, and festivals. Not far away, circles of tall wooden posts stood in the ground. Researchers think the posts may have helped people watch the sunrise and mark the seasons. That would have helped them know when to plant corn.
Several hundred years later, Cahokia was nearly empty. Scientists are still studying why people left. No single answer is certain. What remains are the great mounds, quiet reminders of a busy city built with baskets.